Door



\ W. LOTTER May ll, 1943.

DOOR

zsheets-sheet 1 Filed June lO, 1941 ikg,

W. LOTTER sheets-sheet 2 Filed June lO, 1941 231/ V64/ rc1? mi/SrrafP/YEYJ Patented May l1, 1943 UNITED STATES PATENT OFFICE DOORApplication June 10, 1941, Serial No. 397,464

` (c1. en -36) 9 claims.

This invention relates to a door and more particularly to an unitarydouble glass panel carrier for a. door and which is particularlyapplicable to doors such as are used on ovens or other like chambers ofcooking appliances. l

The primary object of the invention is the provision of a novel andimproved unitary glass panel carrier for a door, the construction andarrangement of which is such as to greatly simplify the doorconstruction and thereby materially reduce the cost of manufacture of adoor of the present type.

A still further object of the invention is to provide a glass panelcarrier or retainer which l is an unit independent of the door and assuch is easily and quickly removable which not only provides for leasyaccess to the space between the glass panels for cleaning purposes butalso simplifies the assembly of the door and thereby reduces the cost offabrication of the door.

A still further object of the invention is to provide a metal door whichhas the foregoing attributes and advantages.

Other specic objects, novel features of construction and improvedresults of the invention will appear from the following descriptiontogether with the accompanying drawings.

In the drawings:

Fig. 1 is a front view of a door embodying the invention.

Fig. 2 is a' fragmentary horizontal section taken on the line 2-2 ofFig. 1.

Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a fragmentary perspective view of the rear side of theindependent glass carrying unit.

Referring now to the drawings and using like characters throughout thedescriptionto designate similar parts, A designates a metallic doorfront panel which in accord with usual practice is suitably enameled andhas throughout its perimeter an lnturned edge. I to provide a panlikeconstruction which telescopically receives the out-turned edge 2 of ametallic door liner B which liner, as will hereinafter appear, is ofpanlike construction so that when the front panel 'and liner areassembled a space or chamber exists between them which is filled withsuitable insulating material 3. It is conventional practice to enamelthe door liner not only for the purpose of enhancing its appearance butto protect this member from the intense-oven heat to which it issubjected.

Centrally the front panel A\ is. provided with an opening having anlnturned peripheral edge 4.

In alignment with said front panel opening the liner is provided with anopening slightly larger than the front panel opening and this opening inthe liner is defined by a Wall 5 the outer edge 6 of which abuts theinner face of the front panel as appears in Fig. 2 of the drawings. Thisliner wall 5 forms one of the walls of the chamber which is filled withinsulating material 3.

The liner B is of a particular shape in cross sectional configurationhaving a portion 'I which parallels the front door panel and a portion 8which is bent or extends at right angles to the aforementioned portion Iand a rear face portion `9 which parallels the front panel A but isspaced therefrom a much greater distance than is the aforementionedliner portion 1. This arrangement provides a door having a veryconsiderable degree of thickness and a door in which the central openingis of considerable depth.

It is within this comparatively deep door opening that the glass panelcarrier C is mounted. This carrier comprises a plate I0 havingthroughout its perimeter a side wall II which abuts the portion 9 of theliner B and a central opening defined by a wall I2 which is preferablyin substantial alignment with the inner end of the wall Il dening theopening in the door front panel A. The edge of this wall defining thewall I2 abuts the inner glass panel D. At-its four corners the panel orplate C is indented to provide semispherical chambers I3 for thereception of the heads of bolts or screws which constitute the solemeans for securing this glass panel carryingr unit to the door. Thesebolts or screws I4 threadedly engage threaded openings in the U-shapedmembers I5 which are disposed within the four inner corners of theinsulation lled chambers of the door.

The door liner is secured in similar fashion to the door front panel bybolts I6 threadedly engaging suitably threaded openings in the U-shapedmembers I'I. This constructionre:- moves completely any unsightly boltor screw head at the outer side of the door construction.

The means for carrying the inner glass panel D andouter glass panel Ecomprises a metallic construction which is preferably welded to theinner face of the panel C. This construction at its vertical sidesprovides oppositely disposed and aligned inner and outer channels I8 andI9 respectively which are spaced apart and interconnected by a wall 20.At its top and bottom this construction is provided with horizontallydisposed channels 2I and 22 having open upper ends and I9 respectively.A pair oi.' horizontally elongated slots are disposed adjacent the topof the construction in alignment with the bottom channels 2l and 22 andare separated by a channel having a bottom 3| and vertically disposedside walls 32 which extend upwardly beyond the slots and form abutmentsfor'the glass panels. These channels are of the proper size to snuglyreceive the glass panels 4or plates D and E to support and hold themagainst any but vertical movement.

The construction embodying these channelways is provided at its sidesand bottom with wall portions 23 and 24 which abut and are electricallywelded or otherwise suitably secured to the inner face or side of theplate C.

By reference to Figures 2 and 3 of the drawings it will be seen 'thatwhen the construction is completely assembled the glass panels provide awindow through which cooking operations in the oven can bevisuallyascertained as desired and that the door is substantially leakproof asthere is a seal at the point 25 between the. carrier panel C and thedoor liner B and that there is a proper seal at the points 26 and 21between the inner and outer glass panels and the carrier plate C andfront door panel A respectively.

From the description given it will be apparent that the window portionof this door is an unitary structure which carries the glass plateswhich can be quickly and conveniently removed from the door by merelyloosening the four bolts or screws which construction is highlydesirable in that it is unnecessary to dismantle the door itself in .anyrespect to get at the window glasses. Upon removal of the windowcarrying unit either or both of the glass panels D or E can be freelylifted or slid upwardly from the carrier through the slots adjacent thewalls 32 as will clearly appear in Fig. 4 of the drawings. Removal ofeither' glass panel will make it possible to clean the opposed faces ofthe glass panels and the space between them.

I claim:

1. An improved construction comprising, a door of substantial thicknesshaving an opening therethrough, the opening at the front of the doorbeing of smaller dimensions than at the rear to provide at the doorfront a shoulder throughout the perimeter of the opening, a panelremovably secured to the rear side of the door and provided with anopening in registry with the door opening, a pair of transparent platescarried by said panel and supported in spaced parallel relationshipthereon, said plates being disposed within said door opening with one ofsaid plates sealing the opening of said panel and the other of saidplates engaging said shoulder and thereby sealing said door opening "atits front, and said plates accompanying said panel when said panel isremoved from said door and being freely removable from said panel.

2. An improved construction comprising, a door oil substantial thicknesshaving an opening therethrough, the front of said door overhanging saiddoor opening to provide a shoulder throughout the perimeter of theopening, a panel removably secured to the rear side of said door andprovided with an opening registering with the door opening, said panelat its inner side and within said door opening provided with side andbottom channelways adapted to receive and support a pair of transparentplates in separated parallel relationship, a pair of transparent platesin said channelways, the innermost of said plates sealing the openingthrough said panel and the rear end of said door opening, and theoutermost of said plates engaging said shoulder and sealing said dooropening at its front end, and said channelways being open at their topsto permit ready removal of said plates from said panel when said panelis removed from said door.

3. An improved construction comprising, a door provided with an openingextending through the outer and inner sides thereof, said door being ofsuch substantial thickness as to widely space the outer and inner doorsides and to make said door opening of considerable depth, a thin panelprovided with an opening extending through the outer and inner sidesthereof, means detachably securing said panel to the face of the innerside of said door with said door and panel openings in registry, meanscarried by the inner face of said panel to support a pair of transparentplates in separated parallel relationship, said plates being free forslidable disconnection from their support when said panel is removedfrom said door but being positioned within said door opening andnon-removable from their support when said panel is secured to saiddoor, one of said plates acting to close the opening through said door,and the other plate acting to close the opening through said panel.

4. A construction such as dened in claim 3 wherein, the door opening atits end adjacent the front of the door is provided with acircumferential shoulder adapted to engage the outer Vface of one of'said plates, and the panel opening at its inner side is provided with aperipheral and inwardly extending wal1 adapted to engage the outer faceof the other plate.

5. A construction such as deilned in claim 3 wherein, the means forsupporting` the glass plates comprises a pair of vertically extendingchannelways adjacent each vertical edge of the panel and a pair ofhorizontally disposed channelways extending transverse the paneladjacent the lower horizontal edge of the panel, said verticalchannelways having open upper ends to permit the plates to be freelyslid upwardly and downwardly in said channelways, and the horizontalchannelways having open tops to freely receive or release the lower endsof said plates as said plates are moved downwardly or upwardly in saidvertical channelways.

6. A construction such as dened ln claim 3 wherein, the means forsupporting the plates comprise a plurality of channelways mounted uponthe inner face of said panel, a pair of said channelways extendingvertically at each side of said panel opening and having open sidesadjacent said panel opening and having open upper and lower ends. astill further pair of said chan` nelways extending horizontally acrosssaid panel below the lower edge of said panel opening and having opensides facing upwardly, said channelways supporting and holding saidplates against displacement in any but a vertical direction. said platesbeing disposed wholly within said door opening and acting to close thesame, andy the top of said door opening acting to prevent the removal ofsaid plates from said channelways by movement in a vertical direction.

7. An improved construction comprising, a door provided with an openingextending through the outer and inner sides thereof, said door being ofsuch substantial thickness as to widely space the outer and inner doorsides and to make said door opening of considerable depth, a thin panelprovided with an opening extending through the removed from said door,one of the sides o! said door opening preventing the removal of eitherof said plates when said panel is connected to said door, and at leastone of said plates acting to close the said opening in said door.

8. The combination comprising, a door having an opening therethroughfrom front to back, a panel having an opening therthrough from front toback, said panel at its back provided with outwardly extending means forfreely removably supporting atransparent plate, means securing saidpanel to the face Aof said door back with said door and panel openingsin registry, said panel plate supporting means and said plate beingdisposed within said door opening. the surrounding wall of said dooropening and said plate supporting means preventing the displacement ofsaid plate when said panel is in place on said door, and said plateacting to close the opening through said door.

9. An improved construction comprising, a door provided with an openingextending'through the outer and inner sides thereof, a panel providedwith an opening extending through the outer and inner sides thereof,means detachably securing y said panel to the door with said doorandpanel WILLIAM LOTTER.

